function readURL(input, img_tag_id) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $('#' + img_tag_id).attr('src', e.target.result);
        };
        reader.readAsDataURL(input.files[0]);
        //alert($("#chonanhdaidien").val());
    }
}
function changeSrc(image) {
    image.src = "resources/img/unknown.png";
    console.log("changed!");
}